Signalling  of Quality of Service
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Signalling of Quality of Service Within Public Telephony Networks. April 26, 2001. Presented by Greg Ratta ( ), ITU-T SG 11 Vice Chairman. Outline. Introduction - elements of QoS signalling Signaling of QoS in B-ISDN Overview of BICC QoS signalling for BICC

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Presented by Greg Ratta ( ), ITU-T SG 11 Vice Chairman

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Presented by greg ratta itu t sg 11 vice chairman

Signalling of Quality of Service

Within Public Telephony Networks

April 26, 2001

Presented by Greg Ratta ( ), ITU-T SG 11 Vice Chairman


Outline

Outline

  • Introduction - elements of QoS signalling

  • Signaling of QoS in B-ISDN

  • Overview of BICC

  • QoS signalling for BICC

  • Summary


Atm service categories

ATM Service Categories

*CDVT is a network characteristic and is not signaled

 = network specific


Presented by greg ratta itu t sg 11 vice chairman

Guaranteed Frame Rate (GFR)

  • Objective: a non-real-time service that provides some QoS commitment while placing minimal constraints on the user

  • Major Application: Carry aggregate TCP/IP traffic between two routers

  • User is free to send any rate up to a PCR all the time, but network commitment is only to an MCR

  • GFR service is “frame-based.”


Presented by greg ratta itu t sg 11 vice chairman

Inclusion of QoS parameters in the SETUP message when the I.356 QoS class is explicitly requested (QoS value different from 0)


Presented by greg ratta itu t sg 11 vice chairman

Inclusion of QoS parameters in the SETUP message when the QoS class value is not explicitly requested and the requested ATC is an I.371 ATC


Inclusion of qos parameters in the setup message supported for backward compatibility

Inclusion of QoS parameters in the SETUP message supported for backward compatibility


What is bicc

What is BICC?

  • BICC provides a means of supporting narrowband ISDN services across a broadband backbone network without impacting the interfaces to the existing N-ISDN network and end-to-end services.

  • The BICC call control signaling protocol is based on N-ISUP signaling

  • The bearer control signaling protocols are based on different bearer technology control signaling protocols (e.g., DSS2 for AAL type 1 and AAL type 2)

  • The BICC call control signaling protocol should not be aware of the actual bearer transport being employed. The binding information is used to reference the bearer.


Bicc network architecture

BICC network architecture


Bicc capability set 1

BICC Capability Set 1

  • Forward and Backward Backbone Network Establishment

  • Transport Call Control via MTP SS7 or ATM

  • Support of most existing narrow band services.

  • New Backbone Network Connection (BNC) with or without Codec Negotiation

  • Reuse of Idle Backbone Network Connection (BNC)

  • Separate Release of Call and Backbone Network Connection (BNC)

  • Bearer Transport Types supported: AAL 1 & AAL 2


Bicc capability set 2 and beyond

BICC Capability Set 2 and Beyond

  • Extend BICC to the Local Exchanges

  • Support IP Bearer, including Tunnelling

  • Support of a Call Mediation Node Function

  • Support Structured AAL1

  • New Identifiers

    • Traffic Group

    • Global Call Reference

  • Extend BICC to Special Resources Nodes (e.g., announcement platforms…etc)


Qos signalling in bicc cs 3

QoS Signalling in BICC CS 3

  • Based on the TIPHON specifications for end-to-end QoS control

    • 4 TIPHON QoS service classes (Best, High, Medium and Best Effort) in ETSI TS 101 329 part 2

    • the signalling and control of end-to-end QoS in TIPHON systems in ETSI TS 101 329 part 3.

  • Initiated joint activity with ITU-T SG 16 for:

    • Translation of the TIPHON defined QoS requirements and signalling flows in protocol requirements.

    • Definition of generic procedures in call/bearer control protocols (BICC, H.225/H.245, SIP/SDP) for end-to-end QoS service control.

    • The specification of a generic H.248 (Megaco) package for end-to-end QoS service control.


Summary

Summary

  • All new services in ITU-T SG 11 to be specified for BICC before being added to ISUP or BISUP

  • QoS signalling available for ATM-based infrastructure

  • Capability for call level QoS signalling under study


Bicc acronyms

AALATM Adaptation Layer

ACFAccess Control Function

ACNAccess Concentration Node

AESAATM End System Address

AGIApplication Generated Identifier

ANIAccess Network Interface

APMApplication transport Message

ATMAsynchronous Transfer Mode

BCFBearer Control Function

BFBearer Function

BICCBearer Independent Call Control

BIWFBearer Interworking Function

BNCBackbone Network Connection

CSFCall Service Function

CSMCall State Model

CMNCall Mediation Node

B-ISUPBroadband ISUP

DSS2Digital Signalling System no.2

GATGeneric Addressing and Transport protocol

GFTGeneric Function Transport control

GITGeneric Identifier Transport

GSNGateway Serving Node

BICC Acronyms

  • INIntelligent Networks

  • IPInternet Protocol

  • ISDNIntegrated Services Digital Network

  • ISNInterface Serving Node

  • ISUPISDN User Part

  • MTP3bMessage Transfer Part no.3b

  • NNINetwork-Network Interface

  • POPPoint of Presence

  • PSTNPublic Switched Telephony Network

  • SNServing Node

  • SPOISignalling Point of Interconnection

  • SS7Signalling System no.7

  • SSCOPService-Specific Connection-Oriented Protocol

  • STPSignalling Transfer Point

  • SWNSwitching Node

  • TDMTime Division Multiplexing

  • TETerminal Equipment

  • TGTrunk Group

  • TSNTransit Serving Node

  • UNIUser Network Interface

  • VCCVirtual Channel Connection

  • VoIPVoice-over-IP


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